Answer:
b. spores of two types to spores of one type
Explanation:
Spores of two types to spores of one type is not the trend to plant evolution because first the spores of one type is present in living organisms but with the passage of time evolution occurs that will leads to formation of spores of two types happen in living organisms. There are types of spores present in plants such as microspores, which produces male gametophytes, and megaspores, which produce female gametophytes while on the other hand, spores of one type is present in plants having asexual reproduction.
Answer:
Reforestation (occasionally, Reafforestation) is the natural or intentional restocking of existing forests and woodlands (forestation) that have been depleted, usually through deforestation, but also after clearcutting.
Amino acids compounds protein molecule is determined
The answer is false, people wouldn't be able to feed themselves
This statement is not true of cilia in the respiratory tract: THEY CLOSE THE WIND PIPE OPENING WHEN SWALLOWING.
Respiratory cilia are hair like structures that are find in the respiratory tract. Their major function is filtration of air for removal of contaminants. They are also capable of removing foreign objects such as smoke, dust and inhaled particles such as pollen from the respiratory system. Another functions perform by the cilia is the movement of mucus away from the lungs into the throat thus helping to protect the lungs from infection.
The closing of wind pipe when swallowing is not part of the functions of the cilia, that role is performed by the epiglottis.
